build_rust=f"rustc $SOURCE -g -o $TARGET"
Command("1_加减乘除_数学运算.out","1_加减乘除_数学运算.rs",build_rust)
Command("2_可变变量_不可表变量_let_mut.out","2_可变变量_不可表变量_let_mut.rs",build_rust)







